Chronic spontaneous urticaria involves plasma leakage, edema, activation of clotting factors, hives, redness.
Genuine frostbite includes varying degrees of coagulation within damaged area.
francebleu.fr/amp/infos/sant…
dermapixel.com/2020/04/covid1…
Also useful for patients to watch for such symptoms if they appear. Stronger evidence for COVID-19 over other infections. Inflammation of capillary walls.
@dartsandmonkeys this is the main thread for COVID-19 acro-ischemia and related suspicious findings in extremities.
It hints at vascular endothelial dysfunction even early in the course or in some mild cases.